The nation`s top federal environmental regulator came to the Memphis area to give Arkansas 100 thousand dollars to reduce truck idling. Environmental Protection Agency Administrator Mike Leavitt ended up eclipsing that with the news that West Memphis and Memphis were not as bad air pollutors as the E.P.A once said. But he still made the originally scheduled announcement giving Arkansas a grant to reduce heavy truck emissions. The program is called SmartWay and promotes a nationwide network of idle-reduction facilities along interstates and railways. One strategy, truck stop electrification, pipes electricity into the cab of a truck so the driver can be comfortable without the truck`s engine turned on.